20070208 Ver 2_More Info Letter_20071029

O~ W A jFR ~ Michael F. Easley, Governor
Q~ QG William G. Ross Jr., Secretary
~ ~, North Carolina Department of Environment and Natural Resources
~ -i
Coleen H. Sullins, Director
© `C Division of Water Quality
October 29, 2007
Wake County
EXP# 07-0566v2
EXPRESS REVIEW NOTIFICATION LETTER
Wake County Public School System
Attn: Mr. Michael Burriss
1551 Rock Quarry Rd
Raleigh, NC 27610
Project Name: Heritage High School
Dear Mr. Burris:
On October 29, 2007, the Express Review Program of the Division of Water Quality (DWQ) received your
application for the above referenced project. The DWQ has determined that your application will require additional
information. Please provide the following information so that we may continue to review your project and
prevent denial of your application as required by 15A NCAC 2H .0506:
1. Please provide full size plans at a scale of 1" = 50' or larger that detail the entire site including
drainage area boundaries, impacts to waters of the state, and stormwater drainage system.
2. Please label and identify the types of BMPs on the Plans.
3. Where applicable on the plans, please include BMP system component details such as Inflow and Outflow
Structures, High Flow Bypass Structures, Pretreatment Systems (Forebays), Overflow and Emergency
Spillway, Erosion and Sediment Control and Monitoring devices such as Energy Dissipators and Sediment
Accumulation/Depth Markers.
4. The drainage area where the new High School and Student Parking are located is considered a pocket of high
density. Therefore the Division of Water Quality requires that the BMP in Area 4 meet both 85% TSS and
30% TN removal efficiencies such as bioretention structures, stormwater wetlands or ponds followed by
forested filter strips designed according to the latest version of the NCDENR Stormwater Best Management
Practices Manual.
5. Since the project is located in a NSW watershed, all stormwater outflow through the riparian buffer shall meet
diffuse flow provisions such as discharging over a level spreader located outside the riparian buffer with a
downslope not to exceed 6% or 8% for grass or forest filter strip respectively. On the other hand, BMPs that
meet conditions specified in item 4 above may substitute for diffuse flow provisions that will allow direct
discharge into stream channels. -_' t'
6. Please provide BMP supplemehts for each' proposed BMPs along with all items in the corresponding
Required Items Checklist.
Detail design, installation, and maintenance
http•//h2o.enrstate.nc.us/su/bmp forms.htm
requirements of all BMPs be found at:
Please respond within five (5) days of the date of this letter by sending three (3) copies of this information. The
Express Review Program is a process that requires all parties to participate in a timely manner.
401 Oversight I Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet: http~//h2o enr state nc us/ncwetlands
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Heritage High School
Page 2
October 29, 2007
This letter only addresses the application review and does' riot authorize any impacts to wetlands, waters or protected
buffers. Please contact Lia Myott at [phone] or Joseph Gyamfi at (919) 715-347 if you have any questions.
Sincer ,
CBK/jg
Cyndi Karoly, Supervisor
401/Express Review Oversite Unit
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
USACE Raleigh Field Office
Central Files
File copy
Mrs. Debbie Edwards, Soil & Environmental Consultants, P.A., 11010 Raven Ridge Rd., Raleigh, NC 27614
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